nix: patch tokei with hledger support

nix/custom/tokei/hledger.patch

@@ -0,0 +1,42 @@
+diff --git a/languages.json b/languages.json
+index ac548b9..b2899f1 100644
+--- a/languages.json
++++ b/languages.json
+@@ -846,6 +846,13 @@
+       "nested": true,
+       "extensions": ["lean", "hlean"]
+     },
++    "Hledger": {
++      "name": "hledger",
++      "line_comment": [";", "#"],
++      "multi_line_comments": [["comment", "end comment"]],
++      "nested": false,
++      "extensions": ["hledger"]
++    },
+     "Less": {
+       "name": "LESS",
+       "line_comment": ["//"],
+diff --git a/tests/data/hledger.hledger b/tests/data/hledger.hledger
+new file mode 100644
+index 0000000..df7259d
+--- /dev/null
++++ b/tests/data/hledger.hledger
+@@ -0,0 +1,18 @@
++# 18 lines 6 code 10 comments 2 blanks
++# a comment
++; another comment
++
++; ^ a blank line
++comment
++account assets             ; Declare valid account names and display order.
++a block comment
++end comment
++
++account assets:savings     ; A subaccount. This one represents a bank account.
++account assets:checking    ; Another. Note, 2+ spaces after the account name.
++account assets:receivable  ; Accounting type is inferred from english names,
++account passifs            ; or declared with a "type" tag, type:L
++account expenses           ; type:X
++                           ; A follow-on comment line, indented.
++account expenses:rent      ; Expense and revenue categories are also accounts.
++                           ; Subaccounts inherit their parent's type.